XANSYS Forum Index
    Register    

FAQ    Search    Memberlist    Usergroups    SmartFeedSmartFeed    Profile    Log in
Search found 48 matches
XANSYS Forum Index
Author Message
  Topic: [Xansys] Importing a parasolid file into ansys apdl
james.johnson

Replies: 5
Views: 7922

PostForum: XANSYS   Posted: Tue Aug 04, 2015 10:52 am   Subject: [Xansys] Importing a parasolid file into ansys apdl
Scaling by 1000/25.4 is exactly correct to whatever number of significant
digits Ansys Classic uses internally. You can type the expression
"1000/25.4" directly into the Ansys GUI or a ma ...
  Topic: Design Modeler vs. SpaceClaim
james.johnson

Replies: 28
Views: 35111

PostForum: XANSYS   Posted: Fri Jun 05, 2015 7:46 am   Subject: [Xansys] Design Modeler vs. SpaceClaim
Joshua,

Thanks for your advice, especially regarding SpaceClaim's lower
tolerances.

I've heard others mention meshing in Workbench and then moving to MAPDL.
Maybe I'll have a go at that soon.

Jam ...
  Topic: Design Modeler vs. SpaceClaim
james.johnson

Replies: 28
Views: 35111

PostForum: XANSYS   Posted: Fri Jun 05, 2015 5:38 am   Subject: [Xansys] Design Modeler vs. SpaceClaim
Is anyone using SpaceClaim to prepare geometry for Ansys Classic (MAPDL)?
I once played around with fixing geometry in DM, exporting to CATIA (maybe
via STEP?), then importing into MAPDL. The resul ...
  Topic: Design Modeler vs. SpaceClaim
james.johnson

Replies: 28
Views: 35111

PostForum: XANSYS   Posted: Mon Jun 01, 2015 6:19 am   Subject: [Xansys] Design Modeler vs. SpaceClaim
Now I've heard it all! :)

James Johnson
(Proud user of Ansys Classic)
Parker Hannifin Corporation

From: "andrew.kelly" <andrew.kelly@honeywell.com>

Call me a fuddy-duddy, but I'm a ...
  Topic: [Xansys] Renumbering of Element numbers and Node Numbers ina
james.johnson

Replies: 1
Views: 2130

PostForum: XANSYS   Posted: Tue May 19, 2015 12:04 pm   Subject: [Xansys] Renumbering of Element numbers and Node Numbers ina
You could then loop thru the 8 surrounding elements and...
select that element's corner nodes...
select only the original element...
reselect corner nodes...
if number of nodes currently selected is 2 ...
  Topic: [Xansys] Renumbering of Element numbers and Node Numbers in
james.johnson

Replies: 0
Views: 1547

PostForum: XANSYS   Posted: Tue May 19, 2015 11:31 am   Subject: [Xansys] Renumbering of Element numbers and Node Numbers in
Hi Joe,

The help for WSORT says that "Reordering affects only the element order
for the solution phase and not the element numbers". That may not be what
the OP wanted.

James Johnson
Pa ...
  Topic: [Xansys] Element Selection : Between coordinate Limits
james.johnson

Replies: 3
Views: 4059

PostForum: XANSYS   Posted: Wed May 13, 2015 4:04 am   Subject: [Xansys] Element Selection : Between coordinate Limits
Hello again Fayaz,

I don't fully understand your analysis workflow, but here are a couple of
ideas.

1. Can you create a component (with the CM command) of the desired nodes
or elements before the ...
  Topic: [Xansys] Element Selection : Between coordinate Limits
james.johnson

Replies: 3
Views: 4059

PostForum: XANSYS   Posted: Tue May 12, 2015 10:08 am   Subject: [Xansys] Element Selection : Between coordinate Limits
So are you doing the following?

allsel,all
esel,s,cent,x,X1,X2
esel,r,cent,y,Y1,Y2
esel,r,cent,z,Z1,Z2

Does that take too long? I'm assuming this will select only those
elements whose centroid is ...
  Topic: [Xansys] [FTT_SPAM] - [APDL] Very High Model Generation Time
james.johnson

Replies: 5
Views: 5179

PostForum: XANSYS   Posted: Fri May 08, 2015 7:05 am   Subject: [Xansys] [FTT_SPAM] - [APDL] Very High Model Generation Time
You did it again! :) It should be "that need to be merged".

James Johnson
Parker Hannifin Corporation

From: "martin.dunn" <martin.dunn@strath.ac.uk>

Apologies for not be ...
  Topic: [Xansys] To script or not to script, that is (generally) the
james.johnson

Replies: 4
Views: 4914

PostForum: XANSYS   Posted: Thu May 07, 2015 4:31 am   Subject: [Xansys] To script or not to script, that is (generally) the
There's another benefit of writing a macro to automate a task even if it
gives no net time savings. The programming experience you gain will be
crucial someday when you or a colleague must automate ...
  Topic: [Xansys] Rotation of a flapping wing in ansys workbench mech
james.johnson

Replies: 1
Views: 1845

PostForum: XANSYS   Posted: Sun Apr 19, 2015 10:50 am   Subject: [Xansys] Rotation of a flapping wing in ansys workbench mech
Hi David,

I suggest that you make use of restraints and loads. These restraints and
loads should represent how the wing will be held and pushed in the real
world. If you need a more specific answ ...
  Topic: [Xansys] [OT: Female scientists
james.johnson

Replies: 22
Views: 17167

PostForum: XANSYS   Posted: Fri Apr 10, 2015 7:46 am   Subject: [Xansys] [OT: Female scientists
It's obvious that by calling her a "hot chick", you are subtly implying
that her scientific body of work is - by itself - not sufficient. :)

Similarly, calling her "brilliant" w ...
  Topic: [Xansys] Different Title for each load step in post processi
james.johnson

Replies: 5
Views: 4656

PostForum: XANSYS   Posted: Thu Apr 02, 2015 4:32 am   Subject: [Xansys] Different Title for each load step in post processi
Hi Benjamin,

The current title will be included in each load step file that is written.
During the solve, those same titles will be included in the results file
as well.

/solu

time,1
/title,Assem ...
  Topic: [Xansys] [APDL] R.I.P. DEBUG
james.johnson

Replies: 100
Views: 99394

PostForum: XANSYS   Posted: Tue Mar 31, 2015 8:49 am   Subject: [Xansys] [APDL] R.I.P. DEBUG
Hi Matt,

I really respect you guys at PADT. Thank you for your hosting of xansys
and for The Focus blog. I know there are many power users at PADT. I've
often wondered how many of you would stil ...
  Topic: [Xansys] [APDL] R.I.P. DEBUG
james.johnson

Replies: 100
Views: 99394

PostForum: XANSYS   Posted: Tue Mar 31, 2015 8:14 am   Subject: [Xansys] [APDL] R.I.P. DEBUG
Matt,

Algor, MSExcel, and a hammer are tools too. Do you consider it
disparaging to say that I wouldn't want to use any of them for FEA?

James Johnson
Parker Hannifin Corporation


"Xansys&qu ...
  Topic: Leaf Spring - FE vs. Analytical Results
james.johnson

Replies: 12
Views: 10314

PostForum: XANSYS   Posted: Thu Feb 26, 2015 6:14 am   Subject: [Xansys] Leaf Spring - FE vs. Analytical Results
Hi Martin,

I know you have already found your problem, but I thought I'd give you
another tip for future analysis. It sounds as if your geometry would
allow for the use of quarter symmetry.

James ...
  Topic: ANSYS[APDL]-Shape Optimization by NMODIF
james.johnson

Replies: 5
Views: 5691

PostForum: XANSYS   Posted: Thu Jan 29, 2015 6:47 am   Subject: [Xansys] ANSYS[APDL]-Shape Optimization by NMODIF
Hi,

I'll just try to help with your 3rd question.

The ARFACE function might help you find your surface area. You can find
it in the help under Mechanical APDL Appendix B.

ARFACE(E) - For 2-D plan ...
  Topic: [Xansys] [APDL] - Line continuation
james.johnson

Replies: 22
Views: 25161

PostForum: XANSYS   Posted: Wed Jan 28, 2015 9:05 am   Subject: [Xansys] [APDL] - Line continuation
Yes "$" is the symbol used to place multiple commands on one line. I
don't believe there is any line continuation character in APDL except for
inside of the *MSG command. This question w ...
  Topic: [Xansys] [OT] Definition of Model Correlation...
james.johnson

Replies: 20
Views: 18334

PostForum: XANSYS   Posted: Mon Jan 12, 2015 8:26 am   Subject: [Xansys] [OT] Definition of Model Correlation...
I've had the most success with correlations to deflections. For our
materials, the modulus of elasticity doesn't vary much and the deflection
isn't sensitive to fillet sizes and such.

I've learned ...
  Topic: [Xansys] Modeling lifting chain
james.johnson

Replies: 11
Views: 9675

PostForum: XANSYS   Posted: Tue Dec 02, 2014 5:20 am   Subject: [Xansys] Modeling lifting chain
Hi Benjamin,

Do you have static limits on the chain and hook from the manufacturer?
Maybe you can use hand calculations to find the forces and compare them to
the manufacturer's limits. If you def ...
  Topic: [Xansys] [STRUC][WB] Interence fit
james.johnson

Replies: 3
Views: 3308

PostForum: XANSYS   Posted: Wed Nov 19, 2014 12:20 pm   Subject: [Xansys] [STRUC][WB] Interence fit
Hi Conor,

Just for clarification, is the part an o-ring? Is your model a quarter
torus (3d) or a quarter circle (2d)? You say it's axisymmetric (2d).
However, I'm having trouble visualizing how 1 ...
  Topic: Heat partition in thermal analysis
james.johnson

Replies: 18
Views: 24256

PostForum: XANSYS   Posted: Thu Nov 13, 2014 5:18 am   Subject: [Xansys] Heat partition in thermal analysis
Michal,

Aren't you over-specifying the problem if you want the temperature at the
two surfaces to match AND you want to specify the proportion of heat
entering each surface? It seems to me that sp ...
  Topic: Heat partition in thermal analysis
james.johnson

Replies: 18
Views: 24256

PostForum: XANSYS   Posted: Wed Nov 12, 2014 11:16 am   Subject: [Xansys] Heat partition in thermal analysis
Or for that matter, maybe you do away with the contacts altogether. If
other modeling considerations allow, you could join the two parts so that
they share nodes. Then apply the heat flux at the j ...
  Topic: Heat partition in thermal analysis
james.johnson

Replies: 18
Views: 24256

PostForum: XANSYS   Posted: Wed Nov 12, 2014 11:07 am   Subject: [Xansys] Heat partition in thermal analysis
Thank you for the explanation.

Given that you want equal surface temperatures on the two parts, perhaps
you could apply the flux in any distribution you want and define a very
large contact thermal ...
  Topic: Heat partition in thermal analysis
james.johnson

Replies: 18
Views: 24256

PostForum: XANSYS   Posted: Wed Nov 12, 2014 8:03 am   Subject: [Xansys] Heat partition in thermal analysis
You are more knowledgeable than I in this subject. However, it goes
against my intuition that the heat flux into the parts should be
different. Why is it not correct to say that the shear forces a ...
  Topic: Heat partition in thermal analysis
james.johnson

Replies: 18
Views: 24256

PostForum: XANSYS   Posted: Wed Nov 12, 2014 7:12 am   Subject: [Xansys] Heat partition in thermal analysis
Hello again,

I'm no tribology expert, but doesn't every action have an equal and
opposite reaction? I believe the shear forces should be the same.

Can you explain why the temperature of both parts ...
  Topic: Heat partition in thermal analysis
james.johnson

Replies: 18
Views: 24256

PostForum: XANSYS   Posted: Wed Nov 12, 2014 6:40 am   Subject: [Xansys] Heat partition in thermal analysis
Hello,

Shouldn't both surfaces receive the same energy? Shear force times
sliding distance?
If so, then you can apply half of the total heat flux to each surface. You
can define a contact
conducta ...
  Topic: Desigm_Modeler Issue
james.johnson

Replies: 30
Views: 25348

PostForum: XANSYS   Posted: Tue Oct 21, 2014 4:24 am   Subject: [Xansys] Desigm_Modeler Issue
Hi Yannis,

I use Ansys Classic so you will have to find specific Workbench
instructions in the Workbench help system. Axisymmetric models are much
more efficient and should be used when the geomet ...
  Topic: Desigm_Modeler Issue
james.johnson

Replies: 30
Views: 25348

PostForum: XANSYS   Posted: Mon Oct 20, 2014 12:09 pm   Subject: [Xansys] Desigm_Modeler Issue
Hello Yannis,

For a sphere you could simplify by using an axisymmetric 2D model.

Maybe Ansys even has 1D elements for modeling spheres? I never looked.

James Johnson
Parker Hannifin Corporation

F ...
  Topic: [Xansys] Workbench caution
james.johnson

Replies: 30
Views: 27880

PostForum: XANSYS   Posted: Mon Oct 13, 2014 12:13 pm   Subject: [Xansys] Workbench caution
I'm still lovin' classic too. It has its own issues but I found
work-arounds 15 years ago.

James Johnson
Parker Hannifin Corporation

From: Xansys


+---------------------------------------------- ...
  Topic: [Xansys] Non-converged solution in contact analysis
james.johnson

Replies: 20
Views: 19651

PostForum: XANSYS   Posted: Thu Sep 25, 2014 4:39 am   Subject: [Xansys] Non-converged solution in contact analysis
Hi Chris,

I'm been a big fan of your common sense and expertise over the
years, but your comments below rub me the wrong way. Do you
really advocate never using contact elements? Nodal restraints
d ...
  Topic: [APDL]Calculate area of solid elements
james.johnson

Replies: 11
Views: 9154

PostForum: XANSYS   Posted: Mon Jun 16, 2014 4:14 am   Subject: [Xansys] [APDL]Calculate area of solid elements
Hi Summer,

I think that the ARFACE function is for the as-meshed node positions.
However, you could probably use the UPCOORD command to move your nodes
based on the solution displacements, then run ...
  Topic: [APDL]Calculate area of solid elements
james.johnson

Replies: 11
Views: 9154

PostForum: XANSYS   Posted: Fri Jun 13, 2014 8:25 am   Subject: [Xansys] [APDL]Calculate area of solid elements
Summer,

The ARFACE function sounds useful.

ARFACE(E)
For 2-D planar solids and 3-D volumetric solids, returns the area of the
face of element E containing the selected nodes. For axisymmetric
elem ...
  Topic: [Xansys] MAPDL:Pictoral Element Summary and Chaboche
james.johnson

Replies: 3
Views: 3080

PostForum: XANSYS   Posted: Fri Nov 22, 2013 11:28 am   Subject: [Xansys] MAPDL:Pictoral Element Summary and Chaboche
I pronounce it the same as I pronounce Chewbacca. Followed of course by Wookie calls.

That being said, Chaboche models are a bit hairy for my taste.

James Johnson
Parker Hannifin Corporation ...
  Topic: [Xansys] [WB] [STRUCT] Bolt Pretension in Axisymmetric Model
james.johnson

Replies: 3
Views: 7674

PostForum: XANSYS   Posted: Wed Nov 20, 2013 9:57 am   Subject: [Xansys] [WB] [STRUCT] Bolt Pretension in Axisymmetric Model
Hi Andrew,

If you are not otherwise using temperatures in your analysis, the easiest solution might be to set the CTE of your "bolt" and impose temperatures to make it shrink. Then maint ...
  Topic: [Xansys] [OTHER] coordinates on the screen ...
james.johnson

Replies: 1
Views: 1495

PostForum: XANSYS   Posted: Tue Oct 22, 2013 4:24 am   Subject: [Xansys] [OTHER] coordinates on the screen ...
I haven't tried to do this, but I see that the question and some tips came up on this list on April 28, 2004. The post subject line is "Convert global coordinates to screen coordinates?"
...
  Topic: [Xansys] [Graphics] Dell Precision T5600
james.johnson

Replies: 2
Views: 2805

PostForum: XANSYS   Posted: Fri Sep 13, 2013 12:47 pm   Subject: [Xansys] [Graphics] Dell Precision T5600
I'm not sure if it's a related issue, but a colleague recently installed ANSYS Classic 14.5 on a new Dell with Windows 7. When using the /ui command to redirect plots to a file the resulting image was ...
  Topic: Total load through a section
james.johnson

Replies: 1
Views: 1603

PostForum: XANSYS   Posted: Fri Sep 13, 2013 4:37 am   Subject: [Xansys] Total load through a section
Hi Andreas,

Assuming that...
- your wheel axis is aligned with the global z-axis,
- one spoke is centered 30 degrees from the xz-plane,
- the angle between spokes is 60 degrees,
- the spok ...
  Topic: [Xansys] FW: SupportCentral Case Escalated, GE Ansys Classic
james.johnson

Replies: 2
Views: 2978

PostForum: XANSYS   Posted: Fri Sep 06, 2013 7:09 am   Subject: [Xansys] FW: SupportCentral Case Escalated, GE Ansys Classic
Hi Dan,

I'd probably use method "c" but relying on external tools makes it non-portable.

Maybe you could incorporate the PRES(N) function in a macro? Maybe loop thru
all external c ...
  Topic: Missing MOONEY-RIVLIN option
james.johnson

Replies: 9
Views: 9297

PostForum: XANSYS   Posted: Wed Jun 26, 2013 4:58 am   Subject: [Xansys] Missing MOONEY-RIVLIN option
From: "aydin.aydin" <e175574@metu.edu.tr>

I wanna model rubber with ANSYS 14 Multiphysics.

But MOONEY-RIVLIN (and also HYPERELASTIC) option(s) does NOT appear
in the "Li ...
  Topic: [Xansys] [STRUC] Why my model can not capture the descending
james.johnson

Replies: 7
Views: 5924

PostForum: XANSYS   Posted: Tue Jun 25, 2013 8:19 am   Subject: [Xansys] [STRUC] Why my model can not capture the descending
From: Xi Chen <xz601190@dal.ca>

For most
material (steel, concrete and masonry) the full stress-strain curve
has a negative slop branch. I just want to simulate the stiffness
degradati ...
  Topic: [Xansys] [OT] Happy Tenth Birthday Xansys.org
james.johnson

Replies: 11
Views: 10036

PostForum: XANSYS   Posted: Fri Jun 21, 2013 12:49 pm   Subject: [Xansys] [OT] Happy Tenth Birthday Xansys.org

I've still got fond memories of undergrad heat transfer. Our
professor used to assign problems such as "Will your can of beer
cool off faster in the refrigerator if it is standing on end or ...
  Topic: [Xansys] [OT] Happy Tenth Birthday Xansys.org
james.johnson

Replies: 11
Views: 10036

PostForum: XANSYS   Posted: Fri Jun 21, 2013 11:06 am   Subject: [Xansys] [OT] Happy Tenth Birthday Xansys.org
From: Christopher Wright <chrisw@skypoint.com>

The sloshing problem has historical significance. The 'sloshing beer
mug' example was Mike Wheeler's contribution to a collection of
worked ...
  Topic: how to calculate stresses on selected nodes
james.johnson

Replies: 9
Views: 6751

PostForum: XANSYS   Posted: Thu Mar 14, 2013 9:57 am   Subject: [Xansys] how to calculate stresses on selected nodes
"alexandre.meli" <alexandre.meli@eureka-project.fr>

Hello Hugo,
first you must be in post processing. Then make your selection,
whatever you want, put the list of your node in ...
  Topic: How to select elements within a particular shape in a body!!
james.johnson

Replies: 6
Views: 4513

PostForum: XANSYS   Posted: Fri Dec 14, 2012 5:26 am   Subject: [Xansys] How to select elements within a particular shape in
Debabrata,

Yes to what Dan and Juergen wrote. In addition, you may incorporate the CENTRX(E), CENTRY(E), and CENTRZ(E) functions if you want all elements having their centroids within your shape. ...
  Topic: [Xansys] Rotating problem
james.johnson

Replies: 1
Views: 1992

PostForum: XANSYS   Posted: Wed Nov 28, 2012 1:54 pm   Subject: [Xansys] Rotating problem
In ANSYS Classic this might be fixed with ctrl-shift-del. Otherwise, try exiting and restarting ANSYS.

James Johnson
Parker Hannifin Corporation

Have you ever encountered a situation where with ...
  Topic: How to apply a distributed load on a beam surface
james.johnson

Replies: 14
Views: 19430

PostForum: XANSYS   Posted: Tue Nov 20, 2012 6:05 am   Subject: [Xansys] How to apply a distributed load on a beam surface
Jeffrey,

In real life, as the beam goes into tension on top and compression on bottom at the wall location, the cross-section wants to become a trapezoid. It shrinks on top and expands on bottom d ...
  Topic: [Xansys] [XANSYS][STRUC]Why do solid elements have no rotati
james.johnson

Replies: 23
Views: 28853

PostForum: XANSYS   Posted: Mon Apr 30, 2012 4:58 am   Subject: [Xansys] [XANSYS][STRUC]Why do solid elements have no rotati
I use 3DOF / node solids with symmetry planes all the time and never noticed any issues. I don't know that I've ever tested whether I get EXACTLY the same results with symmetry vs. a full model. Maybe ...
 
Page 1 of 1
All times are GMT - 7 Hours
Jump to:  


Powered by phpBB © 2001, 2005 phpBB Group

sleek template created by Andrew Charron